<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 下拉 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1===0? 'bdtop' :'','vcenter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二，三级权限 -->
              <el-col :span="19">
                <!-- for循环嵌套二级权限 -->
                <el-row
                  :class="[i2===0?'' : 'bdtop','vcenter']"
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
            {{scope.row}}
            </pre>-->
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column lable="角色名称" prop="roleName"></el-table-column>
        <el-table-column lable="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column lable="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 对话框主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 对话框底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      setRightDialogVisible: false,
      addDialogVisible: false,
      // 添加用户的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '角色名称不能为空', trigger: 'blur' }
        ]
      },
      // 所有权限的数据
      rightsList: [],
      // 定义 tree 规则
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //   默认选中的id值数组
      defKeys: []
    }
  },
  created () {
    this.getRolesList()
  },

  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },

    // 对话框关闭之后，重置表单
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },

    // 点击确定按钮，添加新用户
    addRole () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写完整角色信息')
        const { data: res } = await this.$http.post('roles', this.addForm)
        // 判断如果添加失败，就做提示
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败')
        }
        // 添加成功的提示
        this.$message.success('添加角色成功')
        // 关闭对话框
        this.addDialogVisible = false
        // 重新请求最新的数据
        this.getRolesList()
      })
    },

    // 删除图标功能
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('请问是否要删除该权限', '删除提示', {
        confirmButtonText: '确认删除',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      //   console.log('确认删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除角色权限失败')
      // this.children=res.data
      role.children = res.data
    },

    // 权限分配
    async showSetRightDialog (role) {
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限失败')
      this.rightsList = res.data

      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
      this.roleId = role.id
    },
    getLeafKeys (node, arr) {
      // node代表当前的节点
      // 该函数会获取到当前角色的所有三级权限id并添加到defKeys中
      // 如果当前节点不包含children属性，则表示node为三级权限
      if (!node.children) {
        return arr.push(node.id)
      }
      // 递归调用
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(), // 获取全选节点id
        ...this.$refs.treeRef.getHalfCheckedKeys() // 获取半选节点id
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
.el-breadcrumb {
  margin-bottom: 15px;
  font-size: 12px;
}
.el-button {
  margin-bottom: 15px;
}
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
